Posted by Rick Denney on October 16, 2003 at 17:19:53:
In Reply to: ATT: Rick Denney posted by tim on October 16, 2003 at 03:57:29:
Little did I know as I was wrapping up a class on traffic signal systems and flying back to Virginia from Deeee-troit that my name was being bandied about under false pretenses.
I am an engineer. I am not a physicist. I do not have a Ph.D. in anything.
The wavelength is only approximately related to the length of the bugle. The shape of the bugle has a huge effect on its impedance (and therefore resonant frequencies). The relationship between length, shape, and intonation is extremely complicated, which is why intonation of instrument varies one instrument to the next so much. So, the effect of a change in temperature has to be related to the impedance of the taper design as much as its effect on the wavelength.
I'm assuming that you don't really want to know what to do about temperature changes, but just wanted to scratch come mathematical itch.
Rick "whose tuning slide always seems to stay in about the same place" Denney